每年秋天，鮭魚都會逆流而上，回到出生地洄游產卵。
Every autumn, salmon swim upstream and return to their birthplace to migrate and spawn.
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Example sentences
鮭魚會逆流而上回到產卵地。
鲑鱼会逆流而上回到产卵地。
Salmon swim upstream to return to their spawning grounds.
Usage Notes
Can refer to literally swimming or flowing against the current, or figuratively to opposing a social or historical trend.
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